Device and method for the application of a curable fluid composition to a bodily organ

ABSTRACT

The invention relates to a device suitable for application of a curable fluid composition to encircle a bodily organ. The device comprises a monolithic piece of a flexible material having a length dimension with an inner surface and an outer surface, a first end and a second end, a width dimension, and two spaced-apart sides, wherein a portion of the length dimension proximal to the first end is configured to contact a portion of the length dimension proximal to the second end, the inner surface defining a hollow area between the two spaced-apart sides; and at least one inlet providing fluid communication between the outer surface and the inner surface, for introduction of the fluid into the hollow area. The device deployable around the bodily organ such that when the portion of the length dimension proximal to the first end contacts the portion of the length dimension proximal to the second end, an outer surface of the bodily organ and the hollowed area define an enclosed volume encircling the bodily organ, the enclosed volume suitable for containing the fluid therein.

This application is a divisional application of co-pending U.S. patentapplication Ser. No. 13/780,316 filed on Feb. 28, 2013 which claimspriority to U.S. Provisional Patent Application No. 61/675,206 filed onJul. 24, 2012 and claims benefit of Israel Patent Application 221079filed Jul. 24, 2012. The complete disclosures of the aforementionedrelated U.S. patent applications are hereby incorporated herein byreference for all purposes.

FIELD OF THE INVENTION

The invention relates to the field of devices for application of acurable fluid composition to a bodily organ, and more particularly, to adevice for applying a curable fluid composition to encircle a bodilyorgan, and methods of use thereof.

BACKGROUND OF THE INVENTION

Application of sealant, such as fibrin sealant, is useful for preventingleakage of fluids, such as air and/or liquid from tissues. In surgicalprocedures, fibrin sealant may be applied to wounds, including bleedingor non-bleeding wounds in a bodily organ e.g. by dripping or sprayingthe sealant onto the wound. For example, fibrin sealant can be usedduring an anastomosis procedure, wherein the organ is sutured or stapledaround the entire incision line and fibrin sealant is applied along thestaple or suture line for reinforcement and to prevent leakage.

Fibrin sealant is typically a plasma derived product obtained fromeither commercial sources or some regional blood transfusion centers.Components that are commonly used in preparations of fibrin sealants arepredominantly a fibrinogen component [supplemented with variousquantities of Factor VIII, Factor XIII, fibronectin, vitronectin and vonWillebrand factor (vWF)] and a thrombin component. The fibrinogencomponent is typically activated by the thrombin component which is thelast protease of the coagulation cascade.

Fibrin sealant is formed by an enzymatic reaction involving inter alia,fibrinogen, thrombin and Factor XIII. The thrombin converts thefibrinogen to fibrin by enzymatic action at a rate determined by theconcentration of thrombin. Factor XIII, is typically present in thefibrinogen component of the sealant and is an enzyme of the bloodcoagulation system that cross-links and stabilizes the fibrin clot. Thisprocess bypasses most of the steps of normal coagulation and mimics itslast phase. Some manufacturers add anti-proteolytic agents to the fibrinsealant formulation (as described in WO 93/05822) or specifically removethe plasminogen in order to stop or delay the fibrinolysis (as describedin U.S. Pat. Nos. 5,792,835 and 7,125,569).

Fibrin sealant is commonly applied by spraying the fibrinogen componentand the thrombin component by air assisted spraying, airless spray, orby dripping application.

Air assisted spraying from a close proximity is challenging due toeffect of air on pre-cured fibrin which yields a variable fibrin layerwith irregularities (i.e. thick and thin areas) and uncovered regions atthe application site.

In situations when the space around the organ is limited and an angularand long tip is required to reach the target area, the edge of the tipmay be positioned too close to the tissue surface such that adequatespraying is not attainable. Furthermore, airless spray applicators andair assisted spray applicators may clog.

In dripping application of fibrin sealant, difficulties are encountereddue to dripping against gravity when applying the substance to the lowerpart of the organ.

Application of fibrin around an entire circumference of a bodily organby spraying or dripping is problematic since complete coverage aroundthe organ is very difficult to achieve due to inaccessibility of atleast a part of the organ within the body e.g. the lower part of theorgan.

In addition, the layer formed around the organ has uneven thickness,resulting in stronger and weaker areas of seal. Thus, application of auniform layer is very difficult to achieve.

US 2011/0238097 discloses an apparatus for applying sealant to a targettissue of a luminal tissue at a surgical site. The apparatus includes ahandle, conduit and an end effector e.g. a clamp, which may comprise twojaw members. The handle has means configured and adapted for operatingthe end effector and dispensing biological sealant to the surgical sitevia the end effector. A mechanism to open and close the device istypically located in a handle to cause approximating the ends of thejaws one to the other to wrap around the tissue. The conduit storesand/or carries sealant towards the end effector.

SUMMARY OF THE INVENTION

The invention, in some embodiments thereof, relates to a device forapplying a curable fluid composition to encircle a bodily organ, andmethods of use thereof.

Aspects and embodiments of the invention are described in thespecification hereinbelow and in the appended claims.

According to an aspect of some embodiments of the invention, there isprovided a device [10, 40] suitable for application of a curable fluidcomposition to encircle a bodily organ, the device comprising amonolithic piece of a flexible material [12] having a length dimension[14] with a first end [22] and a second end [24], an inner surface [18]and an outer surface [20], a width dimension [16], and two spaced-apartsides [26 a, 26 b], wherein a portion of the length dimension [14]proximal to the first end [22] is configured to contact a portion of thelength dimension [14] proximal to the second end [24]. The inner surface[18] defines a hollow area [31] between the two spaced-apart sides [26a, 26 b]. The device further comprises at least one inlet [28] providingfluid communication between the outer surface [20] and the inner surface[18], for introduction of fluid into the hollow area [31]. The device[10, 40] is deployable around the bodily organ [30] such that when theportion of the length dimension proximal to the first end [22] contactsthe portion of the length dimension proximal to the second end [24], anouter surface [33] of the bodily organ [30] and the hollowed area [31]define an enclosed volume [32] encircling the bodily organ [30], theenclosed volume [32] being suitable for containing the fluid therein.

In some embodiments, the piece of flexible material is biased to curl toform a planar spiral, such that a portion of the length dimensionproximal to the first end overlaps a portion of the length dimensionproximal to the second end when unconstrained.

In some embodiments, the device is configured so that when deployedaround the bodily organ, a portion of the length dimension between thefirst end and the second end encircles the bodily organ, and an innersurface of the piece of flexible material proximal to the first endintimately contacts an inner surface of the piece of flexible materialproximal to the second end, thereby defining the enclosed volume.

In some embodiments, the piece of flexible material is straight whenunconstrained.

In some embodiments, the device further comprises a plurality of raised,parallel, spaced-apart bands [42] along at least a portion of the outersurface, arranged substantially perpendicular to the length dimension,for providing mechanical strength. In some such embodiments, each bandhas a height in the range of from 1 to 7 mm, a width in the range offrom 1 to 10 mm, and a length in the range of from 28 to 34 mm (or tofit the entire width of the device).

In some embodiments, the device further comprises at least oneplastically deformable strip [44] attached to the inner surface. In someembodiments, the device further comprises two plastically deformablestrips, each attached to one of the two spaced-apart sides. In someembodiments, the plastically deformable strips comprise a metal.

In some embodiments, the width of the piece of flexible material issubstantially constant along the length dimension. In some embodiments,the width of the piece of flexible material proximal to the second endis less than the width proximal to the first end.

In some embodiments, the device comprises at least two inlets.

In some embodiments, the curable fluid composition comprises at leasttwo components. In some embodiments, a first of at least two componentsis activated by a second of at least two components. In some suchembodiments, the first component comprises fibrinogen. In some suchembodiments comprising fibrinogen, the second component, for activationof fibrinogen, comprises thrombin. In some such embodiments, aconcentration of fibrinogen is 51.5 mg/ml and a concentration ofthrombin is 180 IU/ml.

In some embodiments, the flexible material is selected from the groupconsisting of a non-biodegradable material (such as, for example, atleast one of silicone rubber, fluoroelastomer, polychloroprene, andcombinations thereof), a biodegradable material (such as, for example,at least one of collagen, fibrin, gelatin and combinations thereof).

In some embodiments, the piece of flexible material along at least aportion of the length is in the range of from 1 to 8 cm wide, such as inthe range of from 4 to 6 cm wide.

In some embodiments, the piece of flexible material is in the range offrom 4 to 100 cm long, such as in the range of from 7 to 20 cm long.

In some embodiments, the bodily organ is a hollow organ. In someembodiments, the bodily organ is selected from the group consisting of ablood vessel, an organ of the digestive system, an organ of the urinarysystem, and a dura. In some embodiments, an organ of the digestivesystem is selected from the group consisting of an esophagus, a stomach,a small intestine (such as, for example, a duodenum, a jejunum, or anileum), a large intestine (such as, for example, a colon, a cecum, arectum, or an anus), a bowel, and a pancreas.

In some embodiments, wherein the organ of the digestive system isselected from the group consisting of an esophagus and a pylorus of thestomach of a human adult, the piece of flexible material is about 7 cmlong.

In some embodiments, wherein the organ of the digestive system is thesmall intestine of a human adult, the piece of flexible material isabout 13 cm long.

In some embodiments, wherein the organ of the digestive system is thelarge intestine of a human adult, the piece of flexible material isabout 20 cm long.

According to some embodiments, the device of any of the embodimentsdescribed herein is provided for use in applying a curable fluidcomposition to encircle a bodily organ and/or for defining a chambercomprising an enclosed volume around an exposed bodily organ.

According to some embodiments, there is provided a method for applying acurable fluid composition to encircle a bodily organ [30], the methodcomprising providing a device according to any of the embodimentsdescribed herein, deploying the device around the bodily organ so that aportion of the length dimension proximal to the first end contacts aportion of the length dimension proximal to the second end, therebydefining, between an outer surface [33] of the bodily organ and thehollowed area, an enclosed volume encircling the bodily organ; andintroducing the curable fluid composition into the enclosed volumethrough at least one inlet.

In some such embodiments, the curable fluid composition comprises atleast two components, wherein the two components are introduced throughthe same of at least one inlet. In some such embodiments, the at leasttwo components are introduced substantially simultaneously through atleast one inlet. In some embodiments, the at least two components areintroduced sequentially through at least one inlet.

In some embodiments, introducing the curable fluid composition comprisesinjecting the curable fluid composition through at least one inlet.

In some embodiments, the method further comprises allowing the curablefluid composition to cure. In some such embodiments, the method furthercomprises removing the device subsequent to curing of the curable fluidcomposition.

In some embodiments, the bodily organ is a hollow organ. In some suchembodiments, the hollow organ is in a rigid state. In some suchembodiments, the rigid state is achieved by inflation of the bodilyorgan with a fluid.

In some embodiments, the bodily organ is an anastomized bodily organ. Insome such embodiments, the bodily organ is anastomized by a methodselected from the group consisting stapling and suturing. In someembodiments, wherein the bodily organ is anastomized by stapling, thestapler is present in the organ during said applying of the curablefluid composition to provide a rigid state of the bodily organ.

According to some embodiments, there is provided a method for defining achamber comprising an enclosed volume encircling an exposed bodily organ[30], the enclosed volume capable of retaining therein a curable fluidcomposition, the method comprising providing a device according to anyof the embodiments described herein, deploying the device around thebodily organ so that a portion of the length dimension proximal to thefirst end contacts a portion of the length dimension proximal to thesecond end, thereby defining, between an outer surface [33] of thebodily organ and the hollowed area, an enclosed volume encircling thebodily organ.

The device according to the present invention has at least one of thefollowing advantages: enables application of the curable fluidcomposition onto an entire outer cross-sectional dimension of a targetorgan e.g. a cylindrical organ; is sufficiently flexible to be easilyconformed to the shape of the bodily organ; a single device may beself-adaptable for use with a range of bodily organs of different sizesand shapes, or at different locations on a non-uniform organ; enablesuniform application of the curable fluid composition even on an area ofa target organ which is difficult or impossible to access using othermeans; easy to use; cheap and simple to produce; enables application ofa fluid to areas inaccessible to spray/drip and/or against gravity e.g.at the lower side of an organ; allows improved sealing strength relativeto other application methods e.g. spray/drip; prevents leakage of theapplied fluid (prior to curing) by providing a closed volume forcontaining the fluid; and has a short fluid path thereby eliminatingand/or minimizing the risk of inlet blockage due to curing of the fluid.Furthermore, some embodiments of the device described herein can be usedon a rigid and/or non-rigid organ.

The device and method described herein enable a user, such as a surgeonor other medical practitioner, to uniformly apply a curable fluidcomposition around a complete circumference of a bodily organ, withoutleakage of the substance out of the device prior to curing, and enablethe user to easily apply the substance to sections of the organ whichmay be difficult or impossible to access using prior art methods, suchas spray or drip application.

The device and method described herein are particularly useful foraccurate application of a sealant, such as a fibrin sealant, to a bodilyorgan following anastomosis by suturing or stapling. The methoddescribed herein facilitates superior sealing and prevents leakage alongthe suture/staple line. The device and method described herein enable adesired volume of sealant to be applied, resulting in a seal of adesired height, width, and length.

In some embodiments, the sealant is formed in situ upon curing of acurable fluid composition. It was shown according to the presentinvention that optimal sealing strength is obtained with a fibrinsealant formed with a fibrinogen comprising component having 51.5 mg/mlfibrinogen and a thrombin comprising component having 180 IU/mlthrombin.

Unless otherwise defined, all technical and scientific terms used hereinhave the same meaning as commonly understood by one of ordinary skill inthe art to which the invention pertains. In addition, the descriptions,materials, methods, and examples are illustrative only and not intendedto be limiting. Methods and materials similar or equivalent to thosedescribed herein can be used in the practices of the present invention.

As used herein, the term “curable” in connection with a fluidcomposition, refers to a composition which can undergo an interactionbetween its components leading to an increase in viscosity of thecomposition. Such interactions include polymerization and/orcross-linking of components, achieved by means that include, but are notlimited to, use of activating agents such as catalysts, or physicalactivators such as heat, radiation e.g. ultraviolet radiation, electronbeams, or combinations thereof.

As used herein, the terms “comprising”, “including”, “having” andgrammatical variants thereof are to be taken as specifying the statedfeatures, integers, steps or components but do not preclude the additionof one or more additional features, integers, steps, components orgroups thereof. These terms encompass the terms “consisting of” and“consisting essentially of”.

As used herein, the indefinite articles “a” and “an” mean “at least one”or “one or more” unless the context clearly dictates otherwise.

BRIEF DESCRIPTION OF THE DRAWINGS

Some embodiments of the invention are described herein with reference tothe accompanying figures. The description, together with the figures,makes apparent to a person having ordinary skill in the art how someembodiments of the invention may be practiced. The figures are for thepurpose of illustrative discussion and no attempt is made to showstructural details of an embodiment in more detail than is necessary fora fundamental understanding of the invention. For the sake of clarity,some objects depicted in the figures are not to scale.

In the Figures:

FIG. 1A is a perspective view of an embodiment of the device asdescribed herein in an open, constrained configuration;

FIG. 1B is a cross-sectional view of the embodiment of the devicedepicted in FIG. 1A, parallel to the width dimension;

FIG. 1C is a cross-sectional side view of the embodiment of the devicedepicted in FIG. 1A, deployed on a bodily organ;

FIG. 1D is a perspective view of the embodiment of the device depictedin FIG. 1A, deployed on a bodily organ;

FIG. 2A is a top perspective view of an alternative embodiment of thedevice as described herein, in an open configuration;

FIG. 2B is a bottom perspective view of the embodiment of the devicedepicted in FIG. 2A in an open configuration;

FIG. 2C is a cross-sectional side view of the embodiment of the devicedepicted in FIG. 2A in an open configuration; and

FIG. 2D is a cross-sectional side view of the embodiment of the devicedepicted in FIG. 2A, deployed on a bodily organ.

DESCRIPTION OF SOME EMBODIMENTS OF THE INVENTION

The invention, in some embodiments thereof, relates to a device forapplying a curable fluid composition to encircle a bodily organ, andmethods of use thereof.

The principles, uses and implementations of the teachings herein may bebetter understood with reference to the accompanying description andfigures. Upon perusal of the description and figures present herein, oneskilled in the art is able to implement the invention without undueeffort or experimentation. In the figures, like reference numerals referto like parts throughout.

Before explaining at least one embodiment in detail, it is to beunderstood that the invention is not necessarily limited in itsapplication to the details of construction and the arrangement of thecomponents and/or methods set forth in the following description and/orillustrated in the drawings. The invention is capable of otherembodiments or of being practiced or carried out in various ways. Thephraseology and terminology employed herein are for descriptive purposeand should not be regarded as limiting.

Referring now to FIGS. 1A-1D, there is shown an exemplary embodiment 10of a device suitable for applying a curable fluid composition toencircle a bodily organ.

FIG. 1A is a perspective view of device 10, in an open, constrainedconfiguration, prior to deployment on a bodily organ.

Device 10 comprises a monolithic piece of a flexible material 12, whichcan be unwound and constrained to provide a strip having a lengthdimension 14 and a width dimension 16, with an inner surface 18 and anouter surface 20, and two spaced-apart sides 26 a, 26 b, such that ahollow area 31 is defined between inner surface 18 and sides 26 a and 26b. Length dimension 14 has a first end 22 and a second end 24.

Flexible material 12 is or may comprise any non-degradable or degradablematerial, optionally a synthetic or semi-synthetic material. Thematerial is optionally any suitable biocompatible material. Examples ofsuitable materials include, but are not limited to, poly(ethylene);polyesters; poly(propylene), poly(propylene) polyesters such aspoly(propylene) fumarate; polystyrene; polytetrafluoro ethylene (PTFE);nylon; polypropylene/cellulose; polypropylene/PTFE;polypropylene/monochryal; polyester/collagen; poly(acrylate);poly(methyl methacrylate); poly(hydroxy ethyl methacrylate); poly(vinylalcohol); poly(carbonate); poly(trimethylene carbonate); poly(ethylene-co-vinyl acetate); poly(ester urethane); poly(ether urethane);poly(arylate); poly(imide); poly(anhydride-co-imide); poly(amino acid);polydepsipeptide; poly(phosphazene); poly(glycolic acid);poly(lactide-co-glycolide); poly(lactic acid); poly(ε-capro lactone);poly(p-dioxanone); poly(lactide-co-glycolide);poly(ε-caprolactone-co-glycolide); poly(glycolide-co-trimethylenecarbonate); lactide/tetramethylglycolide copolymer; lactide/trimethylenecarbonate copolymer; lactide-δvalerolactone copolymer;poly(lactide)/polyethylene oxide copolymer; lactide (ε-captrolactonecopolymer); unsymmetrically 3,6-substituted poly(1,4-dioxane-2,5-dione);poly(β-alkanoic acids) such aspoly(β-hydroxybutyrate)/(β-hydroxyvalerate) copolymer,poly(β-hydroxybutyrate), poly(β-maleic acid) and polyβ-hydroxypropionate), poly(δ-valerolatone); methylmethacrylate-N-vinylpyrrolidone copolymer, polyesteramide; polyesters of oxalic acid;polydihydropyran; polyalkyl-2-cyanoacrylate; cellulosic materials;composites thereof; and combinations thereof.

In some embodiments, suitable biocompatible materials are optionallynon-degradable materials selected from the group consisting of siliconerubber, fluoroelastomer, polychloroprene, and the like, or biodegradablematerials selected from the group consisting of collagen, fibrin,gelatin and the like, or any combinations thereof.

Length dimension 14 of device 10 is optionally in the range of fromabout 4 to about 100 cm long, such as in the range of from about 7 toabout 20 cm long. Width dimension 16 is optionally in the range of fromabout 1 to about 8 cm wide, or in the range of from about 4 to about 6cm wide. Length dimension 14 is optionally from 0.5 to 100 times thewidth dimension 16.

Depending on the embodiment, width dimension 16 may be constant alongthe entire length dimension 14 of piece of material 12, or piece ofmaterial 12 may taper along length dimension 14 such that widthdimension 16 is narrower at first end 22 than at second end 24. Piece ofmaterial 12 optionally has a thickness in the range of from about 0.3 toabout 15 mm. In some embodiments, the thickness is constant along length12. Optionally, the ratio of length:thickness of piece of material 12 isin the range of from about 3:1 to about 200:1, and the ratio ofwidth:thickness is optionally in the range of from about 6:1 to about40:1.

In some embodiments, the width of sides 26 a and 26 b, is in the rangeof from about 0.5 mm to about 15 mm.

Device 10 further comprises at least one inlet 28, such as, for exampleone, two, three, four, or more inlets. The inlet can have a height 25above outer surface 20 in the range of about 0.5 about 30 mm. An inlet28 provides fluid communication between outer surface 20 and innersurface 18, such that a fluid can be introduced into hollow area 31, forexample by injection. Fluid introduced via inlet 28, is thereby directedto the target site (an area on the outer surface 33 of a bodily organ30) along a short fluid path. Inlet 28 is optionally an aperture havingdimensions sufficient for insertion of a narrow tip, such as a tip of asyringe needle. In some embodiments, the syringe needle has a gaugenumber of from 12 to 25, i.e. an outer diameter in the range of fromabout 0.5 to about 3 mm. In some embodiments, such an aperture isself-sealing, that is to say, is such that a component like an injectionneedle can be forced thereinto, but when the component is withdrawn, theaperture closes to substantially prevent reflux of a fluid.

According to one exemplary embodiment of device 10 described herein,piece of flexible material 12 was prepared from Polyurethane and haslength dimension 14 of about 73 mm long and width dimension 16 of about36.4 mm wide, and three inlets 28 (the distance between the centers ofthe inlets is 20 mm), each inlet 28 having a height 25 above outersurface 20 of about 3.5 mm, and an aperture diameter of about 1.1 mm.The thickness of the material 12 is between 0.3 to 1.5 mm, and the innervolume of the device is about ˜9770 mm³. FIG. 1B is a cross-sectionalview of device 10, parallel to width dimension 16. In FIG. 1B,spaced-apart sides 26 a and 26 b, and hollow area 31 therebetween areclearly seen.

FIG. 1C is a cross-sectional side view of device 10 in an unconstrainedstate, deployed on a bodily organ 30. Piece of flexible material 12 isbiased to curl to form a closed, planar spiral around at least 360degrees around itself in an unconstrained state, such that a portion ofinner surface 18 of length dimension 14 proximal to first end 22,contacts a portion of outer surface 20 of length dimension 14 proximalto second end 24 by overlapping along a portion 23 of length 14. Device10 as shown in FIG. 1C has three inlets, 28 a, 28 b, 28 c.

When device 10 is deployed on organ 30, as shown FIG. 1C, a gap 29, forexample of height about 2 mm is constituted between an outer surface 33of organ 30 and inner surface 18, such that an enclosed volume 32,suitable for containing a fluid, is defined between outer surface 33 ofbodily organ 30 and hollow area 31 formed between inner surface 18 andsides 26 a, 26 b.

FIG. 1D is a perspective view of device 10 deployed on a cylindricalbodily organ 30. The inner diameter 34 of device 10 (shown in FIG. 1C)adjusts itself to the dimensions of outer surface 33 of an organ onwhich it is deployed, such as the outer diameter of cylindrical organ30, such that a single device 10 may be suitable to encircle a varietyof organs 30 having different outer dimensions, to implement embodimentsof the teachings herein. The elasticity and bias of piece of flexiblematerial 12 is optionally such that the bottom portions of each of sides26 a and 26 b maintain uninterrupted contact around a substantiallycomplete circumference of outer surface 33 of organ 30. As is clear to aperson having ordinary skill in the art, for organs 30 having relativelysmaller dimensions, inner diameter 34 is relatively small, and portionof overlap 23 is relatively long.

In contrast, for organs 30 having relatively large dimensions, innerdiameter 34 is relatively large, the point where first end 22 firstoverlaps second end 24 is relatively close to the tip of first end 22,and portion of overlap 23 is relatively short.

The device can be delivered to the desired location by any suitablemeans including, but not limited to, open surgery, and minimallyinvasive procedures (MIS) such as laparoscopy. In one embodiment of theinvention, an incision is made proximal to the target organ and thedevice is deployed on the target organ via the incision. The patient canreceive local, regional or general anesthesia.

The term “open surgery” typically refers to surgery wherein the surgeongains direct access to the target organ via a relatively large incision.As used herein the term “minimally invasive procedure” typically means aprocedure wherein the surgeon gains access to the target organ via smallincisions or through a body cavity or anatomical opening e.g. vialaparoscopy. The device can be delivered to the target organ through anarrow lumen e.g. trocar in a folded form and unwound during deploymenton the target organ.

For use, piece of material 12 of device 10 is first unwound, for examplemanually, so that ends 22 and 24 do not overlap and there is an open gapbetween ends 22 and 24, so that piece of material 12 is in the shape ofan open curve. Piece of material 12 is maneuvered so that ends 22 and 24pass on either side of organ 30. Piece of material 12 is released fromconstraint so that spaced-apart curved sides 26 a and 26 b contact andencircle outer surface 33 of organ 30, substantially as depicted in FIG.1C, where first end 22 overlaps second end 24 along portion of overlap23 to take up any excess length.

A curable fluid composition can then be introduced via inlet 28 into gap29 defined by inner surface 18 of device 10 and outer surface 33 oforgan 30 between sides 26 a and 26 b. In one embodiment of the inventionflexible material 12 is a shape memory material that “remembers” itsoriginal, cold-forged shape.

Referring now to FIGS. 2A-2D, there is shown an embodiment 40 of adevice suitable for applying a curable fluid composition to encircle abodily organ.

FIG. 2A is a top perspective view of device 40. FIG. 2B is a perspectivebottom view of device 40. FIG. 2C is a cross-sectional side view ofdevice 40. FIG. 2D is a cross-sectional side view of device 40 deployedon a bodily organ 30.

Device 40 comprises a monolithic piece of a flexible material 12, havinga length dimension 14, and a width dimension 16, an inner surface 18 andan outer surface 20, forming a substantially straight, quadrilateralstrip e.g. a rectangular strip in an undeployed state. Length dimension14 has a first end 22 and a second end 24. Width dimension 16 has twospaced-apart sides 26 a, 26 b, such that a hollow area 31 is formedbetween inner surface 18 and sides 26 a and 26 b.

Device 40 further comprises at least one inlet 28, such as, for exampleone, two, three, four, or more inlets. Inlet 28 provides fluidcommunication between outer surface 20 and inner surface 18, such that afluid can be introduced into the hollow area, for example, by injection.Fluid introduced via inlet 28, is thereby directed to the target sitealong a short fluid path.

Device 40 optionally further comprises a plurality of raised, parallel,spaced-apart bands 42 along at least a portion of outer surface 20,arranged perpendicular to length dimension 14, for providing mechanicalstrength, and preventing flexible material 12 from collapsing inwardswhen device 40 is deployed on organ 30 and/or excessively ballooningoutwards when a fluid is introduced. In some embodiments, bands 42 havea height in the range of from about 3 to about 7 mm, a width in therange of from about 1 to about 3 mm, and a length in the range of fromabout 28 to about 34 mm. Bands 42 may be formed of the same material aspiece of flexible material 12 as specified above, or of a differentmaterial.

As seen in FIG. 2B, device 40 optionally further comprises at least oneplastically deformable strip 44 functionally associated with innersurface 18 and/or with a surface (e.g. a lower surface) of at least oneof spaced-apart sides 26 a, 26 b. Strip 44 optionally is or comprises ametal, such as, for example, copper, aluminum, tin, platinum, zinc, ironand nickel, or alloys comprising such metals. In one embodiment of theinvention, device 40 comprises two plastically deformable strips 44,each functionally associated with a lower surface of one of spaced-apartsides 26 a, 26 b. Further alternatively, each of sides 26 a, 26 b isoptionally formed with a longitudinal slot 27 for insertion therein ofstrip 44. Strip 44 is optionally provided along the entire length ofinner surface 18 and/or a surface of at least one or sides 26 a, 26 b,or along part of surface 18 and/or sides 26 a, 26 b.

Strip 44 allows the lower surfaces of sides 26 a and 26 b, that contactouter surface 33 of an organ 30 during use of device 40, to be bent intoa desired shape, in order to fit the shape of a specific organ 30,including a non-cylindrical, a rigid and/or a non-rigid organ 30.

A portion 18 a of the inner surface of the flexible material 12, locatedbetween ends 22 and 24 is configured to encircle an outer surface of abodily organ 30. A portion 18 b of the inner surface proximal to firstend 22 is configured to intimately contact or overlap a portion 18 c ofthe inner surface proximal to second end 24, such that inner portions 18b and 18 c proximal to ends 22 and 24, respectively, are pressed oneagainst the other when deployed on organ 30, as shown in side view inFIG. 2D. As further shown in FIG. 2D, when device 40 is deployed onorgan 30, an enclosed volume 32 is defined between hollowed area 31 ofdevice 40 and an outer surface 33 of organ 30.

For use, device 40 is wound around an outer surface 33 of organ 30, andportions 18 b and 18 c are brought into intimate contact along a length35 such that an enclosed volume 32 is defined. In some embodiments, ends22 and 24 are bent to secure one to the other. In some embodiments, ends22 and 24 are secured one to the other using a locking mechanism (notshown).

Length dimension 14 of device 40 is optionally in the range of fromabout 4 to about 100 cm long, such as in the range of from about 7 toabout 20 cm long. Width dimension 16 is optionally in the range of fromabout 1 to about 8 cm wide, or in the range of from about 4 to about 6cm wide. In some embodiments, the width of sides 26 a and 26 b is in therange of from about 0.5 mm to about 15 mm. Length dimension 14 isoptionally from 0.5 to 100 times the length of width dimension 16.

Depending on the embodiment, width dimension 16 may be constant alongthe entire length dimension 14 of piece of material 12, or piece ofmaterial 12 may taper along length dimension 14 such that widthdimension 16 is narrower at first end 22 than at second end 24. Piece ofmaterial 12 optionally has a thickness in the range of from about 2 toabout 15 mm. In some embodiments, the thickness is constant along length12. Optionally, the ratio of length:thickness of piece of material 12 isin the range of from about 3:1 to about 500:1, and the ratio ofwidth:thickness is optionally in the range of from about 6:1 to about40:1.

Embodiments of the device described herein may be used to apply acurable fluid composition to encircle any bodily organ. For example,organ 30 may be a blood vessel (including an artery, such as an aorta,or a vein, such as a vena cava); an organ of the digestive system,including an esophagus, a stomach or part thereof (such as a cardia, afundus, a body, or a pylorus), a small intestine or part thereof, (suchas a duodenum, a jejunum or an ileum), a large intestine or part thereof(such as a colon, a cecum, a rectum, or an anus), a bowel, or apancreas; a dura; an organ of the respiratory system such as a trachea;or an organ of the urinary system (such as a ureter, a urethra, akidney, or a urinary bladder).

The device may be used to apply a curable substance to encircle asurface of a bodily organ of a patient. The term “a surface of a bodypart of a patient” refers to an external surface of the body that can beseen by unaided vision and to a surface of an internal body part whichis a part of the internal anatomy of an organism. The surface can be ableeding or a non-bleeding site.

The device can be used for applying a curable substance to encircle abodily organ in order to decrease the risk of postoperative adhesionformation.

The term “adhesion” refers to an abnormal attachment between tissuesand/or organs. Typically, adhesions occur after surgical procedures suchas following rough manipulation of tissues; following tissue surfacedrying; and/or due to the presence of reactive foreign bodies (e.g.suture materials, talc powder or lint residues) in the operated area.

Organ 30 may be an anastomized organ (i.e. an organ that was subjectedto an anastomosis surgical procedure), wherein anastomosis was achieved,for example, by stapling or suturing, and a curable fluid composition isapplied onto the staple/suture line for reinforcement and/or to preventleakage from the anastomized organ.

The term “anastomosis” typically refers to a surgical procedure which isused to reconnect two or more sections of an organ or tissue.

The term “staple or suture” includes any fastener which is used forclosing a wound such as, but not limited to, staple, clip, pin, hook,suture and the like.

The terms “leak” and “leakage” refer to the escape or passage of asubstance e.g. fluid, viscous material and/or air e.g. through a tear,aperture, bore, fissure, puncture, hole, crack, opening, slit, gap,perforation, fracture, puncture or rupture in a tissue.

In one embodiment of the invention, the device is used to encircle ablood vessel with the curable fluid composition for hemostasis.

The term “hemostasis” refers to the ability of an agent to stop thebleeding from an injured blood vessel and/or to contribute to keepingthe blood contained within the blood vessel.

In one embodiment of the invention, organ 30 is a hollow organ, i.e. anorgan comprising a cavity. A hollow organ can be filled with air, fluid,and/or solids. In some such embodiments, organ 30 is brought to a rigidstate, for example, by inflating with a fluid. The fluid may comprise aliquid and/or a gas. In some such embodiments, following anastomosis bystapling, a rigid state is achieved by keeping the stapler inside thecavity of the hollow organ while the device as described herein isdeployed to encircle the organ, and the curable fluid is introduced intothe gap 29. In one embodiment of the invention, device 10 is for use ona rigid organ, while device 40 is for use on a rigid or non-rigid organ.

For use on an esophagus or pylorus of a stomach of a human adult, lengthdimension 14 of flexible material 12 is optionally about 7 cm long. Foruse on a small intestine of a human adult, length dimension 14 offlexible material 12 is optionally about 13 cm long. For use on a largeintestine or a colon of a human adult, length dimension 14 of flexiblematerial 12 is about 20 cm long.

Since flexible material 12 of device 10 is biased to curl to form aclosed, planar spiral, which is able to self-adjust to encircle organsof varying diameter, a single device 10 may optionally be used withorgans of different dimensions, such that in the case of a smallerorgan, a greater degree of overlap of first end 22 over second end 24will occur.

In the case of device 40, the length of inner portions of 18 b and 18 cwhich are brought into intimate contact when device 40 is deployed onorgan 30, may be increased or decreased in accordance with thedimensions of the outer surface of organ 30, such that a single device40 may be used with organs of different dimensions, such that in thecase of a smaller organ, a greater length 35 of inner portions 18 b and18 c are brought into intimate contact.

In some embodiments, curable fluid compositions useful for applicationusing embodiments of the device described herein comprise a singlecomponent, which may be cured, for example, by application of heat,ultraviolet radiation or electron beams.

As used herein, the term “fluid” refers to any biological fluid (e.g.fluid which derives from living organisms or which is manufactured byrecombinant technology) and/or chemical fluid (e.g. fluid which ischemically synthesized).

In some embodiments, curing of the curable fluid composition occurswithin a time range of from a few miliseconds to a few minutes, forexample in the range of from 2 miliseconds to 10 minutes.

In some embodiments, the curable fluid composition comprises at leasttwo components. In some embodiments comprising at least two components,a first of the two components is activated by a second of the twocomponents. For example, the first component optionally comprisesfibrinogen, and the second component optionally comprises an agent whichactivates fibrinogen, such as, for example, thrombin or a substanceobtainable from snake venom, such that a fibrin polymer is formed uponcuring of the curable fluid composition. Additional, non-limitingexamples of two components of the curable fluid composition describedherein include alginate and calcium; chondroitin sulphate and an acidsuch as hyaluronic acid.

For embodiments wherein the curable fluid composition comprisesfibrinogen and thrombin components, one or both of the components canoptionally be prepared from an initial blood composition. The bloodcomposition can be whole blood or blood fractions, i.e. a fraction ofwhole blood such as plasma. The origin of the fibrinogen and thrombincan be autologous whereby they would be manufactured from the patient'sown blood or from pooled blood or blood fractions. It is also possiblethat the protein components are prepared by recombinant methods.

In one embodiment of the invention, the fibrinogen component comprises abiologically active component (BAC) which is a solution of proteinsderived from blood plasma, optionally further comprising antifibrinolytic agents such as tranexamic acid and/or stabilizers such asarginine, lysine, pharmaceutically acceptable salts thereof, or mixturesthereof. BAC is optionally derived from cryoprecipitate, in particularconcentrated cryoprecipitate. The term “cryoprecipitate” refers to ablood component which is obtained from frozen plasma prepared from wholeblood, recovered plasma or from source plasma which is collected byplasmapheresis. A cryoprecipitate is optionally obtained when frozenplasma is slowly thawed in the cold, typically at a temperature of 0-4°C., resulting in the formation of precipitate that contains fibrinogenand factor XIII. The precipitate can be collected, for example, bycentrifugation and dissolved in a suitable buffer such as a buffercontaining 120 mM sodium chloride, 10 mM trisodium citrate, 120 mMglycine, 95 mM arginine hydrochloride, 1 mM calcium chloride. Thesolution of BAC optionally comprises additional factors such as forexample factor VIII, fibronectin, von Willebrand factor (vWF),vitronectin, etc. for example as described in U.S. Pat. No. 6,121,232and WO9833533. The composition of BAC optionally comprises stabilizerssuch as tranexamic acid and arginine hydrochloride. The amount oftranexamic acid in the solution of BAC is optionally in the range offrom about 80 to about 110 mg/ml. The amount of arginine hydrochlorideis optionally in the range of from about 15 to about 25 mg/ml.

Optionally, the solution is buffered to a physiological compatible pHvalue. The buffer comprises glycine, sodium citrate, sodium chloride,calcium chloride and water for injection as a vehicle. Glycine isoptionally present in the composition at a concentration in the range offrom about 6 to about 10 mg/ml; sodium citrate is optionally present ata concentration in the range of from about 1 to about 5 mg/ml; sodiumchloride is optionally present at a concentration in the range of fromabout 5 to about 9 mg/ml; and calcium chloride is optionally present ata concentration in the range of from about 0.1 to about 0.2 mg/ml.

In one embodiment of the invention, the fibrinogen component is derivedfrom blood. In another embodiment of the invention, the concentration ofplasminogen and/or plasmin in the blood derived component comprisingfibrinogen is lowered. The removal of plasmin and plasminogen from theblood derived component can be carried out as described in U.S. Pat. No.7,125,569 and WO02095019.

The thrombin component optionally comprises human thrombin (800-1200IU/ml), calcium chloride, human albumin, mannitol, sodium acetate andwater for injection.

Components of a fibrin sealant comprising fibrinogen and thrombin areavailable from manufacturers such as OMRIX e.g. EVICEL®, QUIXIL®, Baxtere.g. TISEEL®; CSL e.g. Beriplast® and the like. In one embodiment, thefibrinogen and thrombin components are manufactured from pooled humansource plasma and provided as a single use kit consisting of two vials:one vial contains the fibrinogen component (BAC1 or BAC2) and anothervial contains the thrombin component. The components of the fibrinsealant may be mixed in any desired range of ratios in the method of theinvention. For example, when the concentration of fibrinogen in thefibrinogen component is 40-85 mg/ml and the thrombin concentration inthe thrombin component is about 800-1200 IU/ml, the two components canbe mixed in a ratio of 11:1, 7:1, 6.5:1, 5:1, 3:1, 1:1, respectively,and so on.

In some embodiments, the concentration of the fibrinogen used in themethod of the invention is about 30.5 mg/ml, and the concentration ofthe thrombin used in the method of the invention is about 584 IU/ml. Thementioned concentrations are following mixing of the two components.

In some embodiments, the concentration of the fibrinogen used in themethod of the invention is about 51.5 mg/ml, and the concentration ofthe thrombin used in the method of the invention is about 180 IU/ml. Thementioned concentrations are following mixing of the two components. Thecomponents of the fibrin sealant can comprise one or more additives suchas, but not limited to, biologically active molecules such asantibiotics, anti inflammatory agents, chemotherapy agents, growthfactors, anti-cancer drugs analgesics, proteins, hormones, antioxidantsand the like.

For curable fluid compositions comprising at least two components, eachof the components may optionally be introduced into volume 32 via thesame inlet 28, either simultaneously or sequentially. For example, thecomponents may be introduced via inlet 28 by injection, with the twocomponents injected simultaneously e.g. using a double lumen tip, orsequentially e.g. by use of two single lumen tips. Also, the twocomponents may be mixed before injected. Alternatively, the componentsmay optionally be introduced simultaneously, sequentially or mixed viaat least two different inlets 28 a, 28 b. According to some embodiments,the components may be introduced via a tube e.g. having a bi-lumenarrangement which is connected to the inlet.

In some embodiments, a first portion of one or both components of thecurable fluid composition is optionally introduced into volume 32 via afirst inlet 28 a and a subsequent portion of one or both components isintroduced via at least a second inlet 28 b. Second inlet 28 b isoptionally located diametrically opposite to first inlet 28 a, orseparated from first inlet 28 a by, for example, 90-180 degrees when thedevice is deployed, such that delivery of the fluid composition aroundthe entire circumference of the organ is achieved more efficiently. Inthe event of blockage of first inlet 28 a following introduction of afirst portion of the fluid composition, the remainder of the fluidcomposition may be introduced via second inlet 28 b.

Hence, for example, a double lumen tip may be inserted into a firstinlet 28 a to introduce a first portion of each of the two componentsinto volume 32, then the tip can be removed and inserted into a secondinlet 28 b for introduction of the remaining portion of each of the twocomponents.

Alternatively, two or more tips/injectors may optionally be insertedsimultaneously or sequentially into at least two different inlets 28 a,28 b, for introduction of at least two portions of the fluid into volume32. Each injector optionally comprises a double lumen tip forsimultaneous introduction of each of the at least two components, or asingle lumen tip for introduction of one of the at least two components,such that at least one additional single lumen tip is required forsequential introduction of a second component.

In one embodiment of the invention, following introduction of thecurable fluid composition into volume 32, the fluid is allowed to cure.

Following completion of the curing process, device 10, 40 may beremoved. Alternatively, in the case of a device wherein flexiblematerial 12 comprises a biodegradable substance, device 10, 40 may beallowed to remain deployed around organ 30.

EXAMPLES

Materials and Methods:

Fibrinogen and Thrombin Components.

The fibrinogen component used in the experiments described below is theBiological Active Component 2 (BAC2) of Evicel® fibrin sealant (OmrixBiopharmaceuticals Ltd.), and the thrombin component used is thethrombin component of Evicel® fibrin sealant (Omrix BiopharmaceuticalsLtd.). The two components were used in a 1:1 volume ratio—the finalfibrinogen concentration applied was 30.5 mg/ml, and the final thrombinconcentration applied was 584 IU/ml.

Concentrated fibrin sealant. BAC2 and thrombin components of Evicel®fibrin sealant were used in a 6.5:1 volume ratio—the final fibrinogenconcentration applied was 51.5 mg/ml, and the final thrombinconcentration applied was 180 IU/ml.

Burst pressure test.

The burst pressure provides an indication of the ability of a testedformulation to adhere to an organ tissue and maintain its mechanicalintegrity up to the pressure point in which a burst of the seal occurs,resulting in immediate loss of pressure and visible water leakage. Theburst pressure test was carried out essentially as described in Vilelaet al. [“What Is Important For Continent Catheterizable Stomas:Angulations or Extension?” Int Braz J Urol. 2007; Vol. 33(2): 254-263]to determine and evaluate the ability of the sealant to effectively sealthe organ and withstand pressure. Briefly, a specially designed aluminumpipe of length 27 cm, provided with holes, was inserted into a tubularsegment of pig ileum of length 25-30 cm. The tubular segment was sealedat both ends by attachment to the pipe using plastic discs, which weretightened using metal screws, such that a void area was formed betweenthe segment of ileum and the aluminum pipe. A 5-10 mm incision wasformed perpendicular to the intestine length using a sharp blade, andthen the fibrin sealant formulation to be tested (the formulations areelaborated below) was applied onto the incision area. Application of thefibrin sealant onto the incision was carried out by dripping (from adistance of 10 cm from the target using the Evicel® applicator devicewithout gas; the dripping rate was ˜4 ml/minute through a template frame(20×30 mm; 6 cm²) which was placed around the incision area), spraying[(at 25 psi from a distance of 10 cm from the target using the Evicel®applicator device; the spraying rate was ˜4 ml/minute) through atemplate frame (20×30 mm; 6 cm²) which was placed around the incisionarea], or by using the device described herein. Application by drippingor spraying was carried out only onto the incision site, while fibrinsealant delivered using the device described herein was carried outaround a circumference (i.e. 360 degrees) of the ileum in the incisionarea.

The fibrin was left to cure at room temperature (about 20-25° C.) for 10minutes.

In the next step, the aluminum pipe was connected to a water source, andwater was allowed to flow into the aluminum pipe, such that waterentered into the void area through the holes provided in the pipe, in away that backflow of water into the aluminum pipe was prevented.

Once water entered into the void area, the water pressure increaseduntil the seal of the incision burst, and a sharp drop in pressure wasobserved. The observed pressure level was continuously monitored using apressure gauge (D-logmate 590 MRC Israel) which was connected to theliquid flow line. The maximum pressure prior to the pressure drop wasrecorded and considered as the burst pressure. Typically, a higher burstpressure value indicates a greater sealing strength.

Example 1: The Structure of the Device According to the Invention

A device as shown in FIG. 1A-1D was used in Examples 2-4 below. Thedevice was prepared from Polyurethane. The thickness of the device wasbetween 0.3 to 1.5 mm. The device had a length of 73 mm and a width of36.4 mm. The device had 3 inlets. The distance between the centers ofthe inlets was 20 mm. The height of the inlets above the outer surfaceof the device was 3.5 mm and the diameter of the aperture was 1.1 mm.The inner volume was about ˜9770 mm³.

Example 2: Application of Fibrin Sealant onto an Incision Area by Usingthe Device of FIG. 1

In the following experiment, the efficacy of a device according to theinvention in applying fibrin sealant onto a circumference of a targetarea was explored. The performance of Evicel® following application bythe device of FIG. 1, was evaluated using the burst test describedabove. A device as described in Example 1 was used. Spraying anddripping applications were used as reference.

In this experiment, a 5 mm incision was made and the followingapplication methods were monitored:

I: Evicel® applied by spraying equal volumes of fibrinogen and thrombincomponents, with a total volume of 2.4 ml;

II: Evicel® applied by dripping equal volumes of fibrinogen and thrombinwith a total volume of 2.4 ml;

III: Evicel® applied by introducing equal volumes of fibrinogen andthrombin components with a total volume of 6 ml using the devicedescribed in Example 1.

Four replicates for each treatment were carried out.

The results of the burst pressure test for each application method arepresented in Table 1 below.

TABLE 1 Burst pressure obtained following application of fibrin sealantin different application methods. Burst pressure (mmHg) Application byusing Application Application the device according by spraying bydripping to the invention 1 35 52 58 2 41 17 32 3 35 11 70 4 30 25 107Average 35.3 26.3 66.8 Standard deviation 4.5 18.1 31.2

It was observed that a higher pressure was needed in order to burst thefibrin seal on the intestine tissue when fibrin was formed using Evicel®with the device according to the invention, allowing to encircle theintestine, as compared to the pressure needed to burst the fibrin sealwhen Evicel® was applied by either spraying or dripping onto theincision on a 20 mm×30 mm area, indicating that sing the deviceaccording to the invention to form a fibrin seal results in a greateradhesive force.

It was therefore found that the sealing strength when using the deviceaccording to the invention was superior as compared to the sealingstrength obtained following application by dripping or spraying.

Example 3: Application of Different Fibrin Sealant Formulations onto aSutured Incision Line by Using the Device of FIG. 1

In the previous example it was shown that using a device according tothe invention for application of fibrin sealant results in superiorsealing compared to application by spraying or dripping.

In the following experiment, application of two different fibrin sealantformulations was tested using the device described in Example 1. Theperformance of the formulations was evaluated using the burst testdescribed above; spraying application was used as reference.

In this experiment, an incision line of 10 mm was made and prior toapplication of the fibrin sealant, the incision line was sutured alongits midline with one stitch of 3-0 suture (3-0 SS-684 c-14, Ethicon).

The following formulations and application methods were monitored:

I: Evicel® applied by spraying equal volumes of fibrinogen and thrombincomponents in a total volume of 2 ml.

II: Evicel® applied by introducing equal volumes of fibrinogen andthrombin in a total volume of 4 ml using the device of Example 1.

III: Concentrated fibrin sealant applied by introducing fibrinogen andthrombin components in a total volume of 4 ml using the device ofExample 1.

Four replicates for each treatment were carried out.

The results are presented in Table 2 below.

TABLE 2 Burst pressure obtained following application of differentfibrin sealant formulations in different methods. Burst pressure (mmHg)Application of Application of concentrated Evicel ® fibrin sealantApplication of using the device using the device Evicel ® according toaccording to by spraying the invention the invention 1 63 12 109 2 6 10097 3 31 20 140 4 59 41 86 Average 39.8 43.3 108.0 Standard 26.6 39.823.3 deviation

The results obtained in this experiment corroborate the previous resultsand show that applying Evicel® on a suture line using the deviceaccording to the invention results in superior sealing as compared tothe sealing obtained by the spraying method.

Also, it was observed that a higher pressure was needed in order toburst the fibrin seal on the intestine tissue when fibrin was formedusing the high concentration fibrin sealant and applied with a deviceaccording to the invention as compared to the pressure needed whenEvicel® fibrin sealant compositions was applied by either spraying orusing the device according to the invention.

Thus, application of high concentration fibrin sealant using the deviceaccording to the invention gave significantly superior results comparedto the other treatments (P-value>0.05, T test).

Example 4: Application of Concentrated Fibrin Sealant Formulation to anIncision Area Using Spray or the Device According to the Invention

In the previous Example it was shown that forming a fibrin seal usingthe concentrated fibrin sealant and using a device according to theinvention resulted in superior sealing strength. In the followingexperiment, the performance of concentrated fibrin sealant following useof the device of Example 1 was compared to that of the concentratedfibrin sealant when applied by spraying. The performance was evaluatedby using the burst test described above.

In this experiment, a 5 mm incision was carried out, and theconcentrated fibrin sealant was applied by spraying (a total volume of 2ml) or by using the device according to the invention (a total volume of4 ml) onto the incision as described above.

Four replicates for each treatment were carried out. The results arepresented in Table 3 below.

TABLE 3 Burst pressure obtained following application of differentfibrin sealant formulations onto an incision area in different methods.Burst pressure (mmHg) Application of concentrated fibrin Application ofsealant using the concentrated fibrin device according to sealant byspraying the invention 1 99 115 2 115 134 3 90 118 4 83 132 Average 96.8124.8 Standard deviation 13.8 9.6

It was observed that a higher pressure was needed in order to burst thefibrin seal on the intestine tissue when concentrated fibrin sealant wasapplied using the device according to the invention which allows toencircle with sealant the entire intestinal tissue, compared to thepressure needed when the spray treatment was used onto the incision on a20 mm×30 mm area (P-value>0.05, T test). Thus, the treatment with thedevice according to the invention and concentrated fibrin sealant (asdefined above) is superior as compared to the treatments with spray.

It was therefore found that the adhesive force is improved when using adevice according to the invention and the concentrated fibrin sealant.

It is appreciated that certain features of the invention, which are, forclarity, described in the context of separate embodiments, may also beprovided in combination in a single embodiment. Conversely, variousfeatures of the invention, which are, for brevity, described in thecontext of a single embodiment, may also be provided separately or inany suitable subcombination or as suitable in any other describedembodiment of the invention. Certain features described in the contextof various embodiments are not to be considered essential features ofthose embodiments, unless the embodiment is inoperative without thoseelements.

Although the invention has been described in conjunction with specificembodiments thereof, it is evident that many alternatives, modificationsand variations will be apparent to those skilled in the art.Accordingly, it is intended to embrace all such alternatives,modifications and variations that fall within the scope of the appendedclaims.

Citation or identification of any reference in this application shallnot be construed as an admission that such reference is available asprior art to the invention.

The invention claimed is:
 1. A device suitable for application of acurable fluid composition to encircle a bodily organ, wherein prior todeployment on a bodily organ the device comprises: a monolithic piece ofa flexible material having a length dimension with an inner surface andan outer surface, a first end and a second end, a width dimension, andtwo spaced-apart sides, wherein when said piece of flexible material isunconstrained it forms a planar spiral, such that a portion of saidlength dimension proximal to said first end overlaps a portion of saidlength dimension proximal to said second end, said inner surfacedefining a hollow area between said two spaced-apart sides; and at leastone inlet providing fluid communication between said outer surface andsaid inner surface, for introduction of said fluid into said hollowarea, the device deployable around said bodily organ such that when saidportion of said length dimension proximal to said first end contactssaid portion of said length dimension proximal to said second end, anouter surface of said bodily organ and said hollowed area define anenclosed volume encircling said bodily organ, said enclosed volumesuitable for containing said fluid therein.
 2. The device of claim 1,configured so that when deployed around said bodily organ, a portion ofsaid length dimension between said first end and said second endencircles said bodily organ, and an inner surface of said piece offlexible material proximal to said first end intimately contacts aninner surface of said piece of flexible material proximal to said secondend, thereby defining said enclosed volume.
 3. The device of claim 1,wherein said curable fluid composition comprises at least twocomponents, and wherein a first of said at least two components isactivated by a second of said at least two components.
 4. The device ofclaim 3, wherein said first component comprises fibrinogen and saidsecond component for activation of said fibrinogen comprises thrombin.5. The device of claim 4, wherein a concentration of said fibrinogen is51.5 mg/ml and a concentration of said thrombin is 180 IU/ml.
 6. Thedevice of claim 1, wherein said flexible material is selected from thegroup consisting of a non-biodegradable material, a biodegradablematerial, and combinations thereof.
 7. The device of claim 1, whereinsaid bodily organ is a hollow organ.
 8. The device of claim 1, whereinsaid bodily organ is selected from the group consisting of a bloodvessel, an organ of the digestive system, an organ of the urinarysystem, and a dura.
 9. A method for applying a curable fluid compositionto encircle a bodily organ, the method comprising: providing a deviceaccording to claim 1, deploying said device around said bodily organ sothat said portion of said length dimension proximal to said first endcontacts said portion of said length dimension proximal to said secondend, thereby defining, between an outer surface of said bodily organ andsaid hollowed area, an enclosed volume encircling said bodily organ; andintroducing said curable fluid composition into said enclosed volumethrough said at least one inlet.
 10. The method of claim 9, wherein saidcurable fluid composition comprises at least two components, whereinsaid two components are introduced substantially simultaneously throughthe same of said at least one inlet.
 11. The method of claim 9, whereinintroducing said curable fluid composition comprises injecting saidcurable fluid composition through said at least one inlet.
 12. Themethod of claim 9, further comprising allowing said curable fluidcomposition to cure, and removing said device subsequent to curing ofsaid curable fluid composition.
 13. The method of claim 9, wherein saidbodily organ is a hollow organ.
 14. The method of claim 13, wherein saidhollow organ is in a rigid state.
 15. The method of claim 9, whereinsaid bodily organ is an anastomized bodily organ, and wherein saidbodily organ is anastomized by a method selected from the groupconsisting of stapling and suturing.
 16. The method of claim 15, whereinsaid bodily organ is anastomized by stapling and said stapler is presentin said organ during said applying of said curable fluid composition toprovide a rigid state of said bodily organ.